49921540 has 12 divisors (see below), whose sum is σ = 104835276. Its totient is φ = 19968608.

The previous prime is 49921519. The next prime is 49921583. The reversal of 49921540 is 4512994.

It can be written as a sum of positive squares in 2 ways, for example, as 21958596 + 27962944 = 4686^2 + 5288^2 .

It is a junction number, because it is equal to n+sod(n) for n = 49921496 and 49921505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1248019 + ... + 1248058.

It is an arithmetic number, because the mean of its divisors is an integer number (8736273).

Almost surely, 2^49921540 is an apocalyptic number.

It is an amenable number.

49921540 is an abundant number, since it is smaller than the sum of its proper divisors (54913736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49921540 is a wasteful number, since it uses less digits than its factorization.

49921540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2496086 (or 2496084 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 49921540 is about 7065.5176738863. The cubic root of 49921540 is about 368.2103495739.

The spelling of 49921540 in words is "forty-nine million, nine hundred twenty-one thousand, five hundred forty".